Generating sample error coefficients
First Claim
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1. A method of determining a sample error coefficient between a first signal and a similar second signal comprising the steps of:
- receiving the second signal via a communications channel, the second signal being a transmitted version of the first signal;
dividing the first signal into a first plurality of segments;
dividing the second signal into a second plurality of segments;
determining a first periodicity measure of one of the first plurality of segments and a second periodicity measure of one of the second plurality of segments;
determining that the first periodicity measure and the second periodicity measure exhibit similarity which exceeds a similarity threshold;
determining a third periodicity measure of another of the first plurality of segments and a fourth periodicity measure of one of the second plurality of segments;
determining that the third periodicity measure and the fourth periodicity measure exhibit similarity which exceeds the similarity threshold;
generating a first ratio in dependence upon said first periodicity measure and said second periodicity measure and a second ratio in dependence upon said third periodicity measure and said fourth periodicity measure;
determining a first segment sample rate error coefficient based on the first ratio;
determining a second segment sample rate error coefficient based on the second ratio; and
determining a sampling rate error coefficient based on both the first and second segment sample rate error coefficients.
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Abstract
This invention relates to generation of a sample error coefficient suitable for use in an audio signal quality assessment system. The invention provides a method of determining a sample error coefficient between a first signal and a similar second signal comprising the steps of: determining a first periodicity measure from the first signal; determining a second periodicity measure from the second signal; generating a ratio in dependence upon said first periodicity measure and said second periodicity measure; and determining a sampling rate error coefficient in dependence upon said ratio.
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Citations
19 Claims
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1. A method of determining a sample error coefficient between a first signal and a similar second signal comprising the steps of:
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receiving the second signal via a communications channel, the second signal being a transmitted version of the first signal; dividing the first signal into a first plurality of segments; dividing the second signal into a second plurality of segments; determining a first periodicity measure of one of the first plurality of segments and a second periodicity measure of one of the second plurality of segments; determining that the first periodicity measure and the second periodicity measure exhibit similarity which exceeds a similarity threshold; determining a third periodicity measure of another of the first plurality of segments and a fourth periodicity measure of one of the second plurality of segments; determining that the third periodicity measure and the fourth periodicity measure exhibit similarity which exceeds the similarity threshold; generating a first ratio in dependence upon said first periodicity measure and said second periodicity measure and a second ratio in dependence upon said third periodicity measure and said fourth periodicity measure; determining a first segment sample rate error coefficient based on the first ratio; determining a second segment sample rate error coefficient based on the second ratio; and determining a sampling rate error coefficient based on both the first and second segment sample rate error coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A non-transitory computer readable storage medium storing executable computer program instructions for determining a sample error coefficient between a first signal and a similar second signal, the instructions performing steps comprising:
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receiving the second signal via a communications channel, the second signal being a transmitted version of the first signal; dividing the first signal into a first plurality of segments; dividing the second signal into a second plurality of segments; determining a first periodicity measure of one of the first plurality of segments and a second periodicity measure of one of the second plurality of segments; determining that the first periodicity measure and the second periodicity measure exhibit similarity which exceeds a similarity threshold; determining a third periodicity measure of another of the first plurality of segments and a fourth periodicity measure of one of the second plurality of segments; determining that the third periodicity measure and the fourth periodicity measure exhibit similarity which exceeds the similarity threshold; generating a first ratio in dependence upon said first periodicity measure and said second periodicity measure and a second ratio in dependence upon said third periodicity measure and said fourth periodicity measure; determining a first segment sample rate error coefficient based on the first ratio; determining a second segment sample rate error coefficient based on the second ratio; and determining a sampling rate error coefficient based on both the first and second segment sample rate error coefficients. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification